Rotating 3D data
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I made X, Y coordinates and a triangle with zeros and ones on this plane.
I want to rotate this triangle 45 degrees. I tried rotz(), but I don't have idea to do this.
Thanks in advance.
clc; clear all; close all;
x = linspace(-10,10,49);
y = linspace(-10,10,44);
[X,Y] = meshgrid(x,-y);
Z = zeros(44,49);
Z = importdata('triangle_rotate.txt');
imagesc(Z)
采纳的回答
clc; clear all; close all;
x = linspace(-10,10,49);
y = linspace(-10,10,44);
[X,Y] = meshgrid(x,-y);
Z = zeros(44,49);
Z = importdata('triangle_rotate.txt');
subplot(121); imagesc(Z); axis equal
Z1 = imrotate(Z, 45);
subplot(122); imagesc(Z1); axis equal
6 个评论
Chunru
2021-11-16
You can either crop the image or resize the image (which may change the object size).
태신 김
2021-11-16
Chunru
2021-11-16
If you use a rectangle matrix (with one side along x-axis and another along y-axis) to represent image, you will get different size of rectangle (along x and y) to enclose the rotated image. So you cannot get the same dimension (except for some special case, eg. rotate by 180 deg) in this sense.
Matt J
2021-11-16
You can use the crop option to keep the array the matrix the same size, but there is no guarantee the rotated object will fit inside the original borders:
Z = importdata('triangle_rotate.txt');
Z=imrotate(Z,45,'bicubic', 'crop');
태신 김
2021-11-17
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